• Alnico magnets are made from aluminum, nickel, cobalt and iron and are used since 1930’s. Possibly some other elements such as copper, titanium, and niobium may be added
  • Alnico magnets have a maximum power output of 1 to +/- 9 MGOe and need under normal operating conditions no coating.
  • The maximum operating temperature is, depending on specification, dimensions and system design. biz to 450⁰C.
  • Most Alnico magnets are cast. The liquid alloy is thereby cast at a very high temperature in a sand mold.
  • Some types of this type magnets are also pressed and sintered.
  • Alnico can in complex shapes, such as in a horseshoe shape, be cast.
  • Sintered Alnico has slightly lower magnetic properties, but better mechanical properties than cast Alnico. When casting can arise very small flaws.
  • Standard tolerance for cut Alnico is + / 1 0.1 mm, depending on size and shape.
  • CAUTION: It is important that the correct length / diameter ratio is respected. This avoids demagnetization.
  • The minimum dimension for a block magnet is 2 x 2 x 2 mm, the maximum dimension of 100 x 100 x 100 mm.
  • The minimum dimension for a disc magnet is ∅1 x 2 mm, the maximum dimension ∅100 x 100 mm.
  • The minimum dimension for a ring magnet is ∅5 x ∅3,5 x 1 mm, the maximum dimension ∅200 x ∅ * x 50 mm (* inside diameter after consultation).


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